Statfe-jointer



' (No Model.) Y 3 SheetsSheet 1.

J. SPAULDING, Jr.

STAVE JOINTEB.

' No ."261,1'79. Patented July 18, 1882.

N. PETERS. Pholo-Lithcgnphor. Washi n nnnnnn c 3 Sheets-sheet 2.

(No Model.)

J. SPAULDING, Jr.

STAVE JOINTBR.

Patented July 18, 1882 5Q INVENTUR- UNITED STATES ATENT Garrett JONAS SPAULDING, JR, OF TOWNSEND, MASSACHUSETTS.

STAVE- JOlNTER.

SPECIFICATION forming part of Letters Patent No. 261,179, dated July 18, 1882,

Application filed April 3, 1882. (No model.)

To all whom it may concern.-

Be it known that I, JONAS SPAULDING, Jr., of Townsend, in the county of Middlesex and State of Massachusetts, have invented an Improved Stave-Jointer and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification Figure 1 being a top view of the sliding carriage or bunk and swinging stave-holding bar thereon, together forming the principal part of the machine; Fig. 2, a side view of the same; Fig. 3, a front end view thereof; Fig. 4, a rear end view thereof; Fig. 5,across-seotion of the same; Fig. 6, a view of a part thereof detached; Fig. 7, a top view of the entire machine, showing the carriage in place; Fig. 8, a side view of the same.

Like letters designate corresponding parts in all of the figures.

My invention belongs to that class of stavejointers in which the stave is first bent to the proper curve to form the bilge of the vessel intended to be made, and then jointed by a saw or cutter cutting in a radial plane corresponding with that of the vessel of which the stave is to form a part.

My'improvement comprises several features in such a machine designed to make the staves accurately of equal widths at the two ends, (when the vessel is to be of equal diameters at the two ends,) to makea smooth, close-fitting, and exactly radial joint, and to produce a simple, convenient, and easily and rapidly handled machine at small cost. These several features of improvement will be herein successively described and claimed.

The sliding carriage or bunk A, to which belong the first features of my invention, I find it preferable to make of approximately cylindrical form and of wooden staves, or a peripheral deck, a, secured at the ends to wooden heads I) 12, substantially as shown in the drawings. This forms a firm light carriage, and one that the operator can rest his hand on conveniently when fixing the staves in the clampbar or holder B, mounted on the carriage, and thus facilitate a correct setting of the same. This wooden carriage has or may have suitable iron mountings for strengthening the same,

and for attaching the swinging bar or holder B thereto and controlling its motions thereon and use in other connections, the special uses of which moun tings will be pointed out in the proper places. Thus, first, there are clips 0 c at the four corners of the carriage, respectively under the lower corners or extreme ends of the heads I) b, substantially as shown,to clasp under two ways, 0 G, on the main frame D of the machine, and on which the carriage A traverses, and thereby to hold the carriage securely and accurately in place as it is caused toslidealongunderthejointing-sawE,mounted 0n the said frame or otherwise.

Centrally and longitudinally in the top of the carriage is formed a groove, 0, Fig. 5,wide enough for thetooth of the saw to run in freely, and the points of the saw-teeth enter this groove as the carriage moves along under the saw. This groove not only enables the carriage and its appendages to be brought as closely as practicable to the saw, but it serves as a guide to enable the operator to accurately clamp each stave on the swinging clamp-bar B, so as to waste no material or time unnecessarily, and not to set the stave thereon at random.

The swinging clamp-bar or holder B (properly made of iron) is a rectangular frame, as shown, just long enough to embrace the carriage A longitudinally and be free to swing or oscillate around the same, the upper side, f, swinging as closely as desirable over the upper surface of the carriage.- A suitable mode of mounting and pivoting the swinging bar thus on the carriage is represented in the drawings, consisting of two pivots,h h, screwed from the inside through the heads of the carriage, and entering holes or bearings in the ends 9 g of the clamp-bar, respectively. There are or may be several of these holes or bearings at regular distances apart in the ends of the clampbar, for increasing or diminishing the radius described by the clamp-bar, according to the 1 diameter of the vessels to be made from the staves; and the pivots may be adjustable to different positions in the heads of the carriage, and different swinging bars varying in width may be employed in the fulfillment of this purpose.

The staves are clamped, bent for the bilge,

and held thus in place upon the upper side,f, of this clamp-bar. At the rear end of this side of the clamp-bar is a fixed hook or clip, t, under which is placed one end of each stave to be jointed, and the other end is held by a movable clamp-hook, Gr, while midway between the hooks is a prop or fulcrum block,j, projecting upward from the sidefof the clampbar as high as necessary to give the required bend or bilge to the stave while jointing it. This fulcrum-block is removable and changeable for different work, and it also is adj ustable to different positions, as indicated by the different holding-sockets 7c 70, Fig. 1 to adapt it to different lengths of staves, the fixed hook talso being adjustable to different positions for the same purpose, as indicated by the adjusting-sockets llin the same figure. The fulcrum-block is but a little wider than the clamp-bar, and wide staves bent over it not only are bent longitudinally, but are curved laterally, so that the correct bilge is given to the staves whilejointing them, whatever may be their width.

The construction and operation of the movable clamp-hook G are peculiar and important, and will now be specified.

The clamp-hook reaches across the width of the swinging clamp-bar B at the end thereof next to the operator, projecting beyond the same both upward and downward. It has a longitudinal movement up and down, sliding in guide-mortises, respectively, in the projecting upper side,f, and in the projecting end of thelowerside,m,oftheclamp-bar,substantially as shown in the drawings. The mortise in the sidef is long enough to permita lateral movementbackward and forward of the clamp-hook, equal, say, to the amount of projection of the holding shoulder or catch a of the said clamphook. This allows the clamp-hook to swing back to allow the placing of the end of the stave under the catch after the other end of the stave has been secured under the fixed hook i. The

clamp -hook is sprung forward over the end of the stave by a spring, 0, Fig. 2, which, for convenience, is held in a tubular socket or holder on the bottom of the lower side, m, of the clamp-bar, a piston or plug, g, sliding in the tube and bearing, being by the spring pressed against the lower end of the clamphook below the lower holding-mortise thereof, which serves as a fulcrum to the clamp-hook, so that the upper end of the same is pressed forward with the necessary force over the stave. This clamp-hook is first raised high enough to catch over the raised end of the stave, (the position of which at first is indicated by heavy dotted lines in Fig. 2,) and is then forced directly downward till the end of the stave is broughtdown to the upper side,f, oftheclampbar, bending the stave into proper shape for jointing it, as indicated bylight dotted lines in the same figure. The following device for producing these clamp-hook movements constitutes a special feature of my invention:

the other end of the arm being also pivoted to a block, 15, which is firmly secured to the clamphook. The short arm of the bent lever and the connecting-arm 8 together form a toggle-joint for forcing down the clamp-hook with the required power, as indicated in the drawings.

The toggle-arm 8 might be pivoted directly to the clamp-hook; but for the purpose of adjustment, so as to bring the lever into proper positions for operating and to suit different thicknesses or different degreesof bilge of the staves, the block tis employed, and it is secured to the'clamp-hook adj ustably by screws u a, which pass through longitudinal slots or notches in the block and hold in the clamphook. Besides, the contiguous surfaces of the block and clamp-hook are finely cross-creased or otherwise roughened to prevent any possible slipping of the oneon the other under the powerful force of the toggle-joint and lever.

The form and positions of the lever are substantially shown in Fig. 2, the position of the lever when raised to bring the clamp-hook over a stave to be jointed being shown in full lines, and its position when the stave has been bent and the lever brought into place for pushing the carriage under the saw for jointing the stave being shown by dotted lines. This position is a little past that which is required to clamp the stavein place; but thelever is caused to move a little farther beyond the dead-point of the toggle-joint for two purposesfirst, to retain the clamp-hook in its previously-forced position without continual effort on the part of the operator, and for performing another function, that of holding the swinging clampthe end of the carriage as the lever is pressed downward, thus causing sufficient friction by the contact to hold the swinging bar securely against lateral displacement whilejointing the stave. A Y-shaped or other suitable form of iron mounting, to, Fig. 3, is or preferably may be secured to the end of the carriage, both to strengthen the carriage and for the stops 1) o to bear against and not abrade the wood of the carriage.

The upper end ofthe clamp-hook G is thrown back to unclamp the jointed staves and for the ready admission of staves to be'jointed by means of a cam-projection, x, on the adjacent end 9 of the swinging bar, a slot, 3 in the clamp-hook embracing the same without coming in contact therewith, except just as the clamp-hook is raised nearly to its highest position, when the lower end of the slot 3 strikes and rises upon the inclined lower end of the projection and causes the clamp-hook to be thereof.

the swinging bar B on one of these stops, it is held firmly in place while inserting a stave in the'clamps thereof. The swinging bar is then raised, if required, to bringthe stavein proper position before the saw to joint off one edge of it, the groove e in the top of the carriage serving as a guide to a proper adjustment of the stave in position for jointing. The lever H is then brought down as far as it can be till the stops '0 o touch and bear firmly against the end of the carriage. The carriage is then pushed forward,the operator still holding and bearing on the lever to move the carriage forwardunder the saw. Theleveris then slightly raised to free the stops from contact with the carriage, but still held down far enough to hold the stave clamped, and the swinging bar is then swung over to bring the other edge of the stave into position for jointing off. The leverstops '1; o are then again tightened against the carriage for jointing 0d the second edge of the stave in the same manner as the first edge As soon as the carriage is a second time brought back the lever is raised to unclamp the stave, and the swinging bar is swung over till it strikes'one of the stops z 2, when the shock or jar from the contact throws 0ft thestave withoutits beingtouched by hand. Another stave is then clamped on the swinging bar, and the operation is repeated. Thus the operation of jointingstaves with this apparatus is very convenient and expeditious.

It remains to set forth the construction and arrangement of a safety-stop, I, which is properly secured to or mounted in the frame ot'the machine in a proper position, substantially as shown in Figs. 7 and 8. Its position andt-hickness are such that the swinging bar will not fail to strike it and prevent the pushing forward of the carriage whenever the position of the swinging bar is so nearly vertical that it would strike the saw it moved forward, and

thereby save [the saw from damage; but in every safe position of the swinging bar this safety-stop does not interfere with the forward movement of the carriage. Other stops, as at J K, serve to limit the forward and backward movements of the carriage within the proper range, there being iron projectionspp, Fig. 3, on the end of the bunk to strike the stops K K.

I disclaim equally adjustable clamp-hooks at the ends of the stave-holder in connection with a fulcrum-block in the middle of the holder which is not adjustable.

What I claim as my invention, and desire to secure by Letters Patent, is

l. The carriage A, constructed with the con vex form and guide-groove e,'in combination with the swinging clamp-bar B and saw E, substantially as and for the purpose herein specified.

2. The swinging clamp-bar B, in combination with the carriage A, the said clamp-bar embracing the carriage and pivoted at adjustable centers thereto, substantially as and for the purpose herein specified.

3. The fixed clamp-hook t and fulcrum-block 9', in combination with the operative clamphook G, the said fixed hook and block being adjustable to proportional distances from the hook G on the swinging bar B, substantially as and for the purpose herein specified.

4. The movable clamp-hook G, arranged to slide up and down at the end of the swinging clamp-bar B, and to have a backward and forward swinging-movement at its upper end, in combination with the fixed clamp-hook i and fulcrum-block j, substantially as and for the purpose herein specified.

5. The adjustable stops 9) t on the lover H, in combination with the swinging bar B and carriage A, substantially as and for the purpose herein specified.

6. The cam -projection won the swinging bar B, in combination with the sliding clamphook G, provided with the slot y, the lever H, toggle arm or arms 8, and counter-springo, substantially as and for the purpose herein specified.

JONAS SPAULDING, JR.

Witnesses:

JONATHAN TILToN, SAMUEL B. GIBSON. 

